What Does 'GB' On Luke Gallows And Karl Anderson's WWE Gear Stand For?

As seen on last night's WWE RAW, Luke Gallows and Karl Anderson had "#GB 4 Life" written on the jackets they wore to the ring. These jackets were very similar to the jackets they wore at WrestleKingdom 10 but those said "#BC 4 Life" for The Bullet Club, as seen below.

Social media was full of fans speculating on what the letters meant last night but Gallows' wife Amber Gallows confirmed on Twitter that the "GB" stands for Good Brothers.